Device for taking printed sheets from impression-cylinders of printing machines.



c. WINKLE R. DEVICE FOR TAKING PRINTED SHEETS FROM IMPRESSION CYLINDERS 0F PRINTING MACHINES.

. APPLICATION FILED APR. 25, IBIS- 1,291,665, Patented Jan. 14,1919

T Arman/Ens UNITED STATES PATENT orrron.

' CARL WINKLER, or BERNE, SWITZERLAND.

DEVICE FOR TAKING PRINTED SHEETS FROM IMPRESION-CYLINDERS OF PRINTING- MACHINES.

Specification of Letters Patent.

Patented Jan. 14, 1919.

Application filed April 25, 1916. Serial No. 93,508.

To all whom it may concern Be it known that I, CARL WINKLER, a citizen of the Swiss Republic, residing at Berne, in Switzerland, have invented a new and useful Improved Device for Taking Printed Sheets from Impression-Cylinders of Printing-Machines, of which the following is a as the circumference of said cylinder, while,

- in further delivering said sheet, they have a reduced speed.

()n the accompanying drawing the application of the invention to the type of printing machine in which the impression cylinder is oscillated backward and forward over a. reciprocating form is shown by way of example.

Figure 1 is a side elevation of the main parts of thedevice, all parts being omitted which do not relate to the invention.

Fig, 2 is a plan f the parts shown in Fig. 1.

a is the impression cylinder which is oscillated backward and forward by the spur- -wheel I) in the usual manner, which need not therefore be specially described. At the end of the cylinder or opposite to that at which the spur-wheel b is provided there are two spur-wheels c and d which rotate with said cylinder. In the smaller one (a) of these two spur-wheels en ages the spur-wheel e mounted on the shaft 7 through the agency of a free wheel gear of any known construction, while in the larger spur-wheel d meshes the spur-wheel g, which drives the small spur-wheel h, which, like the spurwheel e, is also mounted on the shaft f by means of a free wheel gear. This shaft carries a. number of rolls i for endless belts k, which are suspended between the rolls z'and similar rolls 1 provided on the shaft m. Near each end the shaft m carries a guide wheel a for the endless chain 0 carried by the chain wheels 31 and q. The chain wheel 7) is fixed to the shaft 1*, while the chain wheel 9 is mounted on the frame 8 of the machine. The shaft 1 is driven by a chain t, which runs over the chain wheel a fastened to said shaft '1 and over the chain wheel 1) fastened to the spur-wheel g. On the shaft 0* are mounted spools w on which belts or cords r (hereinafter called cords alone) are wound, the free end of which are fastened to a spindle or rod y carried by the chains 0.

This mechanism operates as follows In the period in which a printed sheet is wound off the cylinder a, the spur-wheels (l, g and h rotate the shaft f and indeed at such a speed that the belts is move with the same linear velocity as the circumference of the cylinder a. During this motion of the shaft f the spur-wheel e, by reason of its free wheel gear, runs idly, that is, without influencing the shaft 7'. During the period in which the printing is effected the shaft f is rotated by the spur-wheels 0, e at a lower speed than before, and in this case the spurwheel h is rotated idly. Now, as soon as the sheet led off the cylinder 1; by the tongues 2 lies on the belts 70, it will be moved by the spur-wheels c, e at a slower speed toward the cords w. These cords w, owing to their connection with the rod y carried by the chains 0, are alternately wound on and off the spools 'w, according as the chains 0 are moved backward and forward by the chain t and chain wheels '1), u, p and 9. When the belts k are being moved at a higher speed the cords a: are wound on the spools w and the rod 3/ is then moved toward said spools. When, on the other hand, the belts in are moving with decreased speed the cords a: will then be unwound from the spools w by the shaft y being moved away from the spools w. The printed sheet is accordingly taken off the belts k by the cords a: and is slowly moved over the delivery table. When the rod y returns toward the spools w the sheet carried by same is held by the device commonly used for such purposes in connection with printing machines and not shown on the drawing, so that said sheet is not moved back again, but can be taken from said cords a: in known manner.

The printing machine to which the new device is applied need not be of the type in which the form is reciprocated backward and forward underneath a reciprocating cylinder, as in the example shown on the drawing, as any other kind of printing machine with an oscillating or continuously rotating impression cylinder may be used.

What I claim and desire to secure by Letters Patent of the United States is 1. In combination with the impression cylinder of a printing machine, of a sheet delivery belt device, means to periodically drive said belts at the same linear speed as the circumference of said impression cylinder, while the sheet is passing from said cylinder to said belt device and until it has entirely left said cylinder, means to periodi cally drive said belts at a lower speed, a second sheet transporting device adapted to take the sheets from said belt device and deliver them to the delivery table, and means to reciprocate said second sheet transporting device over the delivery table at the reduced speed of said first belt system, substantially as set forth.

2. In combination with the impression cylinder of av printing machine, a sheet conveying belt device, comprising in combination: two shafts, rolls on said shafts, belts carried by said rolls, two spur-wheels mounted loosely on one of said shafts, a free wheel gear connecting said spur-Wheels to said shaft for free rotation in the same direction, and two spur-wheels adapted to rotate with said impression cylinder and engaging in said first two spur-wheels, substantially as set forth.

' 3. In combination with the impression cylinder of a printing machine, a sheet conveying belt device'adapted to be moved at two different speeds and comprising in combination: two shafts one near to said impression cylinder and one at some distance from said impression cylinder, rolls on said shafts,belts carried by said rolls, two spur-wheels mountin the same direction, two spur-wheels adapt ed to rotate with said impression cylinder and engaging in said first two spur-wheels,

spools disposed near the shaft more remote from said impression cylinder, cords adapted to be wound on and off said spools, and a reciprocating rod to which the free ends of said cords are attached, substantially as set forth.

4. In combination with the impression cylinder of a printing machine, a sheet conveying belt device adapted to be moved at two different speeds and comprising in combination: two shafts, one near to said impression cylinder and one at some distance from said impression cylinder, rolls on said shafts, belts carried by said rolls, two spur-wheels mounted loosely on the shaft near said impression cylinder, a free wheel gear connecting said spur-wheels to said shaft for free rotation in the same direction, two spurwheels adapted to rotate with said impression cylinder and with one of which engages one of the said first two spur-wheels, spools disposed near the shaft more remote from said impression cylinder, cords adapted to be wound on and off said spools, a rod to which the free ends of said cords are attached, endless chains carrying said third shaft, chain wheels carrying said endless chains, a spur and chain wheel gear connecting said chain wheels with said impression cylinder, substantially as set forth.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses. CARL WINKLER. Witnesses:

T. MURBACH, H. T. SHEHLIN. 

